Automatic gun



ocr. 6,1925- 0 atj-bthifendesoirthecasing A enclosinglthe recoilfspringei153fin#V ter-posed betweenfthe fronrtendiofiftne "easing f' jf-anda'ring"Ibiked t'ofth 'barrel mg. f; Whenfcarrying@out` c he. reciv ifoeatnn.; v lkfprtf f A movement-@offtheifcasing frelativlyftoythe' "Th'Present invention relateSfO'mPIOVQ-f Stationary .barrel under the'nuenceiof the ments in automatic g'unsand provides a, recoil action' ofthe shfotand of'fthe recoil-l Y l cooling arrangement for such automatic': f"sp1lng the ycasing 5l together1 'with ,the sil guns f f clos1ng r1ngs 9, 10`Land Il forma double' '.QThcar1angement of cooling ribstranse` actingwair'pump, of whichthecasing islthe1 fg.. versely or longitudinally'- arrangedponf the cyl1nder1 and vthe ring, Vl1 facts vas piston,VK j f barrel for cooling the latterris known. Wherebyair yis sucked` and expelled through f l The subject matter ofthe presentinven-#theV apertureslQ in thecasing. The .casing f i011'k is an Varrangement adapted' to; gauge@ 5 has thus the double function as abutment continuous renewal of the layer ofair sur?l Wmember'of the recoil spring and as cylinder rounding the barrel and thereby amore iii--for .the cooling arrangement.V 1" 75. 'ftense cooling action, when the'gun is l'ired. The closinggrings 9,' l0V and llare comb-; To'thisfend the recoil spring,vwhich is disshaped, i. e. they are provided with radial ]g laced after every shot is arrangedVV afs a extensions which fit well into the, interi "."pum-pcylinder of a double'acting pump' the mediate spaces 2" between theribs 2 yof the* y f piston-of which is formed bya closing ring ybarrelfso that `the Vtotal Y free cross-section 80 fixed to the barrel so that Vafrencwall of cool-jj between barrel'V and casing is `substantially ing airis eHectedwth-everyshot. v "filled up. by these rings. j

Preferably-*closing rings are 1erovidiedgat I claim bothk ends ofithe casing vrenclosing the recoil'- '1. In an automatic gun, in combination, a, "Spring,Which'lOSe-"fhe'Spabetweenthe barrel provided Wahiongnudinai nbsfa 85;

casingand the barrel againstqtlieoutside.; breech, a casing surrounding said barrel and: Aperurs .jlslOi-,S my bepr0vided n lthe rlgidlyconnected to sa1d"breech, a recoil y f spring casing through whichthe vinflow and `-Spllng enclosed 1n fsald, Caslng and, Opera# I ".outflow oftheair occurs. tively connected to the latter whereby the f i A .construetonal example. of the subject casing .is adapted t0 Carry'out va recprcatif90t "i *.inatter of'thejpresent invention isillustrated'A ing movement relatively to'Y thebarrel when,

".in'theaccornpanying drawings in which: the j gun'is fired, and a Jring .fixed toisaid'.;l

ig,` 1 shows part of thefautomatie gunY barrelfin'termediate of the endsofsadcas-4 ,Y nini-anoutSidevieW,v andrjsubstantially 'lling up Vthe free-'x :VV is a vhorizontal section.throughy the `cross-section between barrel andca'sing'zand u tom'atic gunwith the breech cocked, acting as stationary piston Yto the reCipr'f-'. V Figb is across section alo'nglne III-'III'lgcating casing which acts vfas an airtpiunp forlf.' n rkFig.y 2.k and v i1 f 'renewing the air surrounding theball'el and 1 -,F"g.j4/ Sh ows on a smaller scale thecomyincreasing the .cooling actionyj le'te-v Vvautomatic gunmount'edy on 1ag'un-V v `Inan automatic gun, "in combination',fa' 1 00 Y carriage. j f a 'barrel .provided-1v with longitudinal ',ribs',V` Y

The automaticv gun i-illustratedis a7 'large lbreech, a casing surrounding saidy barrel and *y A v bore'automatic'gunpof Vthe lrnowntype in Yrigidly connected tolv said b r` e,c h,ia -recoil ""fi 'Y whichzth'ebarrelis stationary andthe breechv spring enclosed/in said casing ,:.and opera-f v nl i jmovesA vrelatively tothe'barrelby the recoil tively connected to the latter whereby the 105 Factiongsafter'every Shot -andlis returned into casing is adaptedto carry out a r `ecprocat-y l= its/initial `position by a recoil spring. lThe -i'ngmovement relatively to the barrel when,VV

barrel 1 sprovided Ywith longitudinal ribs the gunifsred, ring'sprovided on both ends kvandj carries the trunnionring 3. and isv of said casingandhaving'eXtensions that fit l 'screwedxinto thev breach sleeve'il. 'The casinto the intermediate spaces betweenV said 110';y

vided with apertures,

ribs on the barrel to close theends of the annular space between the casing and the barrel substantially` air-tight,l and a ring fiXedto said barrel intermediatev of the ends of said' casing Vand substantially filling up the free cross-section between barrel and casing and acting as stationary piston to the reciprocating casing which acts.V as an air pump for renewing the air surrounding the barrel andgincreasing the cooling action.

- 3. In an automaticV gun, in combination, a barrel provided with longitudinal ribs, a breech7 a casing surrounding said barrel and rigidly connected to saidbreech and proa recoil spring enclosed in said casing andv operatively con'- nected tothe latter whereby the casing is Y adapted to carry out a reciprocating move thus the air surrounding the barrel. i

In testimony whereof, I have signed niy name to this specification.

' ALBERT KNG. 

